Steam-engine



(No Model.)

3 Sheets-'Sheet 1. H. UNZIOKER.

STEAM ENGINE.

No. 475,365. Patented May 424, 1892.

/fv 'ww/ZW? 3 Sheets-Sheet 2.

Patented May 24.1892.

(No Model.)

H. UNZIOKER.

STEAM ENGINE (No Model.) 3 Sheets-Sheet 3.

H. UNZICIUJR.` STEAM ENGINE.

No. 475,365. Patented May 24, 1892.

mlmmum UNITED STATES PATENT Clarion.

HERMANN UNZICKER, OF CHICAGO, ILLINOIS.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 475,365, dated May 24, 1892.

Application filed December 18, 1891- Serial No. 415,470. (No model.)

To all whom it may concern.:

Be it known that I, HERMANN UNZICKER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in steam-engines, and more particularly to a novel arrangement for operating the cut-off of an engine by the movement of the operating-lever thereof, the object being to provide an engine of this description in a simple, durable, and efficient manner.

The invention consists in the features of construction and combinations of parts hereinafter fully described and particularlyclaimed.

In the accompanying drawings, illustrating my invention, Figure l is a perspective view of the cylinders and parts of the piston-rod and eccentric-rods of a double Corliss engine provided with improvements embodying my invention. Fig. 2 is a perspective view on an enlarged scale of one of the cylinders. Fig. 3 is a perspective view similar to Fig. l, and showing a modified form of construction embodying my invention.

It will of course be plainly understood that my invention is applicable to various types of engines, although it is illustrated as applied to a double Corliss hoisting-engine. This type of engine is selected as it illustrates in a clear manner the principle of the invention. It is obvious that in hoisting a heavy object-such, for instance, as the cage in a mine-greater power is required to give the first impulse thereto or to start the same in motion than is thereafter required to continue such motion, and it is the object of this invention to provide an engine with devices for conveniently and expeditiously varying the power thereof to conform to the work to be performed.

Referring to said drawings, A indicates the cylinder of a Corliss engine of familiar construction.

The construction and arrangement of the valves, exhaust, and operating devices illustrated being that of the ordinary Corliss engine, a description thereof will be omitted, as such will be obvious to those skilled in the art to which it appertains.

B is the valve-rod, connected at one end with the ordinary valve-disk 1 and at its other end to the rocker-arm 2. The link motion for reversing the motion of the engine is of familiar construction and embraces the eccentric-rods 3, pivoted to the link 4, that has a sliding pivotal connection with the pin 5 upon the rocker-arm 2. A block 6 is secured to said link, and said block 6 is secured to an oscillating shaft '7 by means of an arm 8, rigidly secured to said shaft, and a bar 9, connected with said block 6 and arm 8. The said shaft 7 is mounted in suitable bearings l0 and is provided with an arm 1l, that is connected by means of a rod l2 with the reverse-lever C. It will thus be seen that by manipulating the operating-lever C the link can be shifted, as desired, to control the motion of the valves and exhausts to attain the desired motion of the engine, as will be plainly obvious.

In accordance with the broad idea comprised by my invention the cut-off for the valve is operated by the movement of the 0perating-lever C, so that they are operated by the same movement that regulates the reversing-gear of the engine. The connection between such cut-off and the operating-lever C is such that when said operating -lever is moved to a certain extent to shift the link 4 so that the pin of the rocker-arm 2 stands in a position between the center of said link and one of its ends the cut-off will not be operated; but, however, when the operating-lever is moved farther and shifts the link 4, so that the pin 5 is located nearer the end of said link, the cut-off will be operated to an extent proportionate to the throw of the operating-lever, and thus out off the supply of steam to the valve. The parts are arranged so that the above result will be accomplished upon throwing the operating-lever in either direction. It will of course be obvious that various oonstructions could be employed to operate the cut-off simultaneously and proportionately to the shifting of the link, and in the accompanying drawings two dierent constructions are shown as applied to a double Corliss hoisting-engine; but it will be understood that it IOO 3o the segment 23.

4o oscillating rod 25.

5 connecting-rods 14 with two arm-s 15 and 1G,

rigidly secured to a transverse rock-shaft 17. The said rock-shaft 17 is mounted in suitable bearings, and in the construction shown is mounted in bearings in posts 18 upon the xo cross-head guide portions of the frame 19.

The said rock-shaft 17 also passes through a bearing 2O upon the under side of the -platform 21 for the engineer, and an arm 22, rigidly secured to said rock-shaft adjacent said bearing 20, extends in the direction of the operating-lever and will be more fully referred to hereinafter. The said rock-shaft 17is also provided with a weighted arm 33, the movement of which is limited by a stop 34, that 2o normally holds the said rock-shaft in such a gage the notches in a segmental guide 23, supported by posts 24 upon said platform 21. An upright longitudinally oscillating rod 25 is located at its upper end between guide-rollers 26 upon the side of and about the center of The said rod 25 extends downwardly below the platform and is provided at its lower end portion with a slot 27, that receives a pin 28 upon the arm 22. To Vthe upper end portion of the operating-lever C is pivoted an arm 29, havinga flexible connecting-piece 30 at its lower end that passes between guide-rollers 31, mounted upon a frame 32 upon the platform 2l and in vertical alignment with the guide-rollers 26 for the The flexible connectingpiece 30 extends down below the platform 2l and is connected with the rod 25 near the upper end of the slot 27 therein.

In Figs. 1 and 2 the operating-lever C is shown in full lines at the middle of its throw 5o arm 22 will be located near the upper end of the slot 27 in said oscillating rod. When the engine is first started with a load, the operating-lever is thrown as far as the dotted line marked This effects the starting of the engine and lifts the oscillating rod 25 until the lower end of the slot engages the pin 28 upon the arm 22. After the load is started, and so much power as was first required is unnecessary, the operating-lever C is thrown 6o farther toward the position shown in dotted lines and marked y, proportionately to the extent that it is desired to operate the cut-off, which is attained by reason of the oscillating rod 26 lifting arm 22 and turning rock-shaft 17, that operates the cut-offs in an obvious manner, as fully shown in dotted lines in Fig. 2. When the operating-lever is moved back toward its central position, the weighted arm 33 of the rock-shaft turns said shaft and operates the cut-off proportionately.

In Fig. 3 is shown another construction embodying this invention. In this construction the platform 21 is located below said rockshaft 17, and said rock-shaft 17 is provided with an arm 35, that projectsin an upwardlyinclined direction with its upper end located near one end of the segment 23 in the path of a projection 3G, carried by the operating-lever C. A lever 37 is pivoted to the platform near the other end of the segment, and has the end of vits upper arm 38 located in the path of said projection 36. The lower arm 39 of said lever 37 is connected by means of a connecting-rod 40 with the arm 35, whereby the rock-shaft is turned when said lever 37 is swung upon its point. The arm 35 and lever 37 are each provided with anti-friction rollers upon their upper ends. It will be seen in connection with this construction that the ends of the arm 35 or lever 37 will b e engaged and moved by the projection on the operating-lever only after said operating-lever has moved past the position shown by the dotted lines .fr to accomplish the result heretofore described.

I do not wish to be understood as limiting the application of my inventionto ahoistingengine nor to a Corliss engine, as it can be applied to various forms of engines, and therefore I do not wish to be limited to the special features of construction hereinshown, as they may be varied to be applied to different types of engines without departing from my invention.

I claim as my invention- 1. The combination, substantially as hereinbefore set forth, with the operating-lever of a steam-engine, of a connection between said operating-lever and the cut-offs, practically as described, so that said cut-offs will be operated simultaneously with and by the movement of said operating-lever.

2. The combination, substantially as hereinbefore set forth, with the operating-lever of a steam-engine, of cut-offs intermittently connected therewith to be moved in one direction by said lever, and devices for moving said cut-olfs in the opposite direction.

3. The combination, substantially as hereinbefore set forth, with the operating-lever of a steam-engine, of a connection between said operating-lever and the cut-offs embracing a lost motion and adapted to move said cut-offs in one direction, and devices for moving said cut-offs in the opposite direction.

4. The combination, substantially as hereinbefore set forth,with the operating-lever of a steam-engine, of a connection between said operating-lever and the cnt-offs, practically as described, so that said cut-offs will be operated by said operating-lever during only a portion of their stroke and moved in one direction thereby, and devices for moving said cutoils in the opposite direction.

5. The combination, substantially as here- IOO lIO

inbefore set forth, with the operating-lever and the cut-offs, of a connection between said operating-levers and cnt-offs for moving said cut-offs in one direction and a weight for moving them in an opposite direction.

6. The combination, with the cut-offs of a steam-engine, of a rock-shaft having arms connected therewith, an operating-lever, and a connection between said lever and rock-shaft embracing a lost motion for moving said cnt-V offs in one direction and devices for moving said cut-offs in the opposite direction.

7. The combination, with the cut-offs of a steam-engine, of arock-shaft havin g arms connected therewith, an operating-lever, and a connection between said lever and rock-shaft embracing a lost motion, whereby the shaft is moved in one direction and a weight for moving said shaft in an opposite direction.

8. The combination, substantially as hereinbefore set forth, with the cut-offs of a steamengine, of a rock-shaft having arms connected therewith, a pivoted operating-lever, a iiexible connection between said operating-lever and a longitudinally-movable rod having a yielding connection with an arm upon said rockshaft, whereby said cut-offs are moved in one direction, and devices for moving said cut-offs in the opposite direction.

9. The combination, substantially as hereinbefore set forth, with the cut-offs of a steamengine, of a rock-shaft having arms connected therewith, an operating-lever, a flexible connection between said operating-lever and a longitudinally-movable rod having a connection with an arm upon said rock-shaft embracing a lost motion, whereby said cut-offs will be moved in one direction, and devices for moving said cut-offs in an opposite direction.

lO. The combination,substantially as hereinbefore set forth, with the cut-offs of a steamengine, of a rock-shaft having arms connected therewith, an operating-lever, a exible connection between said operating-lever and a longitudinally-movable rod having a slot to receive a pin upon an arm upon said rockshaft, whereby said cut-offs will be moved in one direction, and devices for moving said cutoffs in an opposite direction.

1l. The combination,substantially as hereinbefore set forth, with the cut-offs of a steamengine, of a rock-shaft having arms connected therewith, an operating-lever, a longitudinally-movable rod having a connection with an arm upon said rock-shaft embracing a lost motion and located between guides, a flexible connecting-piece connecting said lever and rod and confined between guides located adjacent said rod, whereby said cut-offs will be moved in one direction, and devices for moving said cut-offs in an opposite direction.

l2. The combination, substantially as hereinbefore set forth, with the cut-offs of a steamengine, of a rock-shaft having arms connected therewith, an operating-lever, a longitudinally-movable rod having a connection with an arm upon said rock-shaft embracing a lost motion and located between guides,a pivoted arm upon said lever, a flexible connectingpiece connecting said arm with said rod and conned between guides located adjacent said rod, whereby said cutotfs will be moved in one direction, and devices for moving said cut-offs in an opposite direction.

In testimony whereof I affix my signature in presence of two witnesses.

HERMANN UNZICKER. W'itnesses;

HARRY COBB KENNEDY, OTTO LUEBKERT. 

